The dog should be put down and ideally should have been shot on the spot. And some dogs do go for the face. There should be no biting dogs on the street and no breeds considered dangerous unless they are specially licensed and there are dog inspectors who make sure they are in some sort of extremely secure situation and are taken care of properly and could never break out. There should never ever be a return of a dog that does something like that to an owner who might be clueless, who might have been lax, who might be one of those who says my dog is loveable, etc. etc. Whatever the reason the dog should go. Next time it could be a two-year old and it often is. mg